Ludlow group
- A subdivision of the British Upper Silurian lying below the Old Red Sandstone; — so named from the Ludlow, in Western England. See the Chart of Geology.
The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.